Update CHANGELOG.md

Author: paddycarver

CHANGELOG.md

@@ -2,6 +2,8 @@
 
 BUG FIXES
 * Fix a bug that would pass the post-destroy state to `helper/resource.TestCase.CheckDestroy` instead of the documented pre-destroy state [GH-591]
+* Clean up the final remaining places where test numbers or dangling resources warnings could be omitted from errors [GH-578]
+* Stop considering plans empty when they include data source changes [GH-594]
 
 # 2.0.3 (September 15, 2020)